=>2x-5/7=-11/18:(-11/14)=7/9
=>2x=94/63
=>x=47/63
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ko dùng máy tính
\(\dfrac{1}{7}+\dfrac{1}{8}+\dfrac{1}{9}+\dfrac{1}{10}+\dfrac{1}{11}+\dfrac{1}{12}+\dfrac{1}{14}+\dfrac{1}{15}+\dfrac{1}{18}+\dfrac{1}{22}+\dfrac{1}{24}+\dfrac{1}{28}+\dfrac{1}{33}\)
1. thực hiện phép tính
a. dfrac{11}{21}+dfrac{-4}{7}
b. dfrac{5}{15}+dfrac{14}{25}-dfrac{12}{9}+dfrac{2}{7}+dfrac{11}{25}
c. dfrac{2}{3}+dfrac{5}{7}-dfrac{3}{14}
d. dfrac{2}{5}-dfrac{3}{7}+dfrac{9}{45}
e.dfrac{21}{47}+dfrac{9}{45}+dfrac{26}{47}+dfrac{45}{5}
f. dfrac{15}{12}-dfrac{18}{13}+dfrac{5}{13}-dfrac{3}{12}
g. dfrac{-8}{18}-dfrac{15}{27}
h.dfrac{3}{7}+dfrac{-5}{2}-dfrac{3}{5}
i.(dfrac{11}{12}:dfrac{33}{16}).dfrac{3}{5}
Đọc tiếp
1. thực hiện phép tính
a. \(\dfrac{11}{21}\)+\(\dfrac{-4}{7}\)
b. \(\dfrac{5}{15}\)+\(\dfrac{14}{25}\)-\(\dfrac{12}{9}\)+\(\dfrac{2}{7}\)+\(\dfrac{11}{25}\)
c. \(\dfrac{2}{3}\)+\(\dfrac{5}{7}\)-\(\dfrac{3}{14}\)
d. \(\dfrac{2}{5}\)-\(\dfrac{3}{7}\)+\(\dfrac{9}{45}\)
e.\(\dfrac{21}{47}\)+\(\dfrac{9}{45}\)+\(\dfrac{26}{47}\)+\(\dfrac{45}{5}\)
f. \(\dfrac{15}{12}\)-\(\dfrac{18}{13}\)+\(\dfrac{5}{13}\)-\(\dfrac{3}{12}\)
g. \(\dfrac{-8}{18}\)-\(\dfrac{15}{27}\)
h.\(\dfrac{3}{7}\)+\(\dfrac{-5}{2}\)-\(\dfrac{3}{5}\)
i.(\(\dfrac{11}{12}\):\(\dfrac{33}{16}\)).\(\dfrac{3}{5}\)
a) \(\left(7\dfrac{4}{9}+3\dfrac{7}{11}\right)-3\dfrac{4}{9}\)
b) \(5\dfrac{2}{7}\cdot\dfrac{8}{11}+5\dfrac{2}{7}\cdot\dfrac{5}{11}-5\dfrac{2}{7}\cdot\dfrac{2}{11}\)
c) \(1\dfrac{13}{15}\cdot0,75-\left(\dfrac{11}{20}+25\%\right):\dfrac{7}{5}\)
Giúp mình nha
Đang cần gấp
2. thực hiện phép tính
a. dfrac{3}{4}+dfrac{3}{5}-dfrac{18}{60}
b. dfrac{17}{8}-dfrac{11}{6}-dfrac{2}{9}
c. dfrac{20}{45}+dfrac{14}{35}+dfrac{32}{44}
d.dfrac{23}{29}+dfrac{5}{11}+dfrac{17}{11}
e.17dfrac{25}{27}+3dfrac{7}{2}
Đọc tiếp
2. thực hiện phép tính
a. \(\dfrac{3}{4}\)+\(\dfrac{3}{5}\)-\(\dfrac{18}{60}\)
b. \(\dfrac{17}{8}\)-\(\dfrac{11}{6}\)-\(\dfrac{2}{9}\)
c. \(\dfrac{20}{45}\)+\(\dfrac{14}{35}\)+\(\dfrac{32}{44}\)
d.\(\dfrac{23}{29}\)+\(\dfrac{5}{11}\)+\(\dfrac{17}{11}\)
e.\(17\dfrac{25}{27}\)+\(3\dfrac{7}{2}\)
left(dfrac{2}{3}+dfrac{2}{13}+dfrac{2}{11}+dfrac{2}{6}right) left(dfrac{5}{4}+dfrac{5}{7}+dfrac{5}{6}+dfrac{5}{11}right)
___________________ X ___________________
left(dfrac{4}{3}+dfrac{4}{13}+dfrac{4}{11}+dfrac{4}{6}right) left(dfrac{9}{4}+dfrac{9}{7}+dfrac{9}{6}dfrac{9}{11}right)
Đọc tiếp
\(\left(\dfrac{2}{3}+\dfrac{2}{13}+\dfrac{2}{11}+\dfrac{2}{6}\right)\) \(\left(\dfrac{5}{4}+\dfrac{5}{7}+\dfrac{5}{6}+\dfrac{5}{11}\right)\)
___________________ X ___________________
\(\left(\dfrac{4}{3}+\dfrac{4}{13}+\dfrac{4}{11}+\dfrac{4}{6}\right)\) \(\left(\dfrac{9}{4}+\dfrac{9}{7}+\dfrac{9}{6}\dfrac{9}{11}\right)\)
2. thực hiện phép tính
a. \(\dfrac{2}{5}-\dfrac{3}{7}+\dfrac{9}{45}\)
b\(\dfrac{5}{15}+\dfrac{14}{25}-\dfrac{12}{9}+\dfrac{2}{7}+\dfrac{11}{25}\)
c.\(\dfrac{21}{47}+\dfrac{9}{45}+\dfrac{26}{47}+\dfrac{45}{5}\)
\(\dfrac{\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{13}}{\dfrac{5}{7}-\dfrac{5}{11}+\dfrac{5}{13}}+\dfrac{\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}}{\dfrac{5}{4}-\dfrac{5}{6}+\dfrac{5}{8}}\)
THỰC HIỆN PHÉP TÍNH NHA MN
\(\dfrac{-4}{11}\times\dfrac{7}{15}-\dfrac{4}{15}\times\dfrac{8}{11}+\dfrac{-5}{11}\)
\(2\dfrac{2}{3}-2\dfrac{3}{5}\times\dfrac{10}{7}-\dfrac{7}{5}\)
các bạn làm trong hôm nay dùm mình nhé, cảm ơn
tính
\(\dfrac{4}{7}.\dfrac{5}{11}+\dfrac{4}{7}.\dfrac{6}{11}\)